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Finding the Fourth Proportional to 8,652.30, 12,978.69 and 2,412.78

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Solution

The fourth proportional to 8,652.30, 12,978.69 and 2,412.78 is: 3,619.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,652.30 : 12,978.69 = 2,412.78 : x
  2. Step 2: Convert to fraction form
    8,652.30/12,978.69 = 2,412.78/x
  3. Step 3: Cross multiply
    8,652.30x = 12,978.69 × 2,412.78
  4. Step 4: Simplify right side
    8,652.30x = 31,314,723.66
  5. Step 5: Solve for x
    x = 31,314,723.66/8,652.30
  6. Step 6: Final answer
    x = 3,619.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.